U of S | Mailing List Archive | alt-photo-process-l | Re: Demachy and red chalk

Re: Demachy and red chalk

But won't you get something more like pink (instead of red) if you mix
chalk and red iron oxide?


23 Mayıs 2009, Cumartesi, 4:14 am tarihinde, ender100 yazmış:
> Chris,
> I think you are right.  If I remember, the Red Chalk or Sanguine was a
> special chalk that had a lot of iron oxide in it.
> Were the Demachy prints in this color gums or photogravures?
> --
> Best Wishes,
> Mark Nelson
> Precision Digital Negatives
> PDNPrint Forum @ Yahoo Groups
> Mark Nelson Photography
> On May 22, 2009, at 8:10:22 PM, "Christina Z. Anderson"
> <zphoto@montana.net> wrote:
> Henry,
> Try Venetian red, Indian red, or red ochre.  It was a red iron oxide
> pigment if I remember correctly. One recipe calls for 3 g. Venetian red
> powder to 1/2 oz. gum. Another calls for a pigment called "light red"
> which I know was available about 10 yr ago anyway.  But Venetian Red is a
> nice brick-y color that you'd be happy with. My notes say this:  "For
> instance, a Venetian red or red ochre color  was used to approximate the
> rust colored conte crayon portraits." 
> Chris